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Fittings
Section 9
Choosing the correct Perma-Crimp™ fitting may be simply
identifying the fitting to be replaced by measuring the
fitting or in some other way, identifying its size and thread
type. Care should be taken in using the correct fitting.
1.
The correct fitting is chosen to match a replacement
fitting and/or chosen on the basis of formal design and
sound engineering practice.
2.
Any questions or concerns involving fitting selection
should be addressed with the local Sales Representative,
Hydraulic Applications Group, or with our Customer
Service Group
at 800-235-4632.
3.
Selecting the proper hose assembly - see
assemblies section of this catalog. A helpful guide
is the
“
S.T.A.M.P.E.D.”
process, which requires the
documentation of the following:
S
Size – ID, OD and length of the assembly
T
Temperature – Temperature of material conveyed and
climatic conditions
A
Application – Conditions of use including abrasion,
flexing and routing
M
Material – Type, concentration and composition
P
Pressure – Includes surge or impulse pressure
E
Ends – Style, type, orientation and attachment methods
D
Delivery – Includes testing, quality and packaging
requirements
In completing the
“
S.T.A.M.P.E.D”
process, “Ends” need to
be further defined.
Thread Size
Drop Length
Thread Type
Hose Type
Male or Female
Hose Dash Size
Angle of Elbow
Hose Working Pressure
4.
The Perma-Crimp™ fitting is available in four styles
including Ultra-Crimp™, Uni-Crimp™, Field-Grip™ or Dual-
Grip™. Each fitting consists of a stem and a ferrule. The
stem fits into the hose ID. The ferrule attaches the fitting
to the hose cover. The stem has two functional ends. The
first is the hose end, which is used to attach the fitting to
the hose. The hose end must be compatible with the ID of
the hose. The other end is the thread end, which is used
to attach the assembly to another port in the hydraulic
system. The thread end will be determined from the
fitting being replaced or by measuring the port or threads
being attached.
5.
Temperature range is important in both hose and fitting
selection. Hose temperature ranges are shown on page
43
of this catalog. In general, fittings will be comparable
with hose temperature ranges with the exception of
O-ring fittings, which are limited to 2120F (1000C).
6.
Flange identification requires additional information.
Code 61 Flanges, Code 62 Flanges and Caterpillar®
Flanges are commonly used to connect large sizes of
hose and tubing. Code 61 Flanges are commonly used
in applications of 3,000-5,000 psi working pressure,
while Code 62 Flanges can be used in applications up
to 6,000 psi working pressure. Code 62 and Caterpillar®
Flanges are similar in application but Caterpillar® Flanges
have a thicker flange head and are frequently found
on Caterpillar® equipment. Flanges are identified by
measuring the port hole diameter, the longest bolt hole
spacing and the flange head thickness.
7.
It is possible to have a fitting rated at a lower working
pressure than the hose. Keep working pressure in mind
when selecting a fitting. The hose assembly can be rated
no greater than the lowest pressure rating of either hose
or fitting. Reference working pressure tables can be found
on pages 35-40.
Note: Dimensions in the catalog are listed as approximate and for reference only. Dimensions are subject to change.
Choosing the Correct Fittings
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses